RU2317443C1 - Sucker-rod pumping unit - Google Patents

Sucker-rod pumping unit Download PDF

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Publication number
RU2317443C1
RU2317443C1 RU2006109936/06A RU2006109936A RU2317443C1 RU 2317443 C1 RU2317443 C1 RU 2317443C1 RU 2006109936/06 A RU2006109936/06 A RU 2006109936/06A RU 2006109936 A RU2006109936 A RU 2006109936A RU 2317443 C1 RU2317443 C1 RU 2317443C1
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RU
Russia
Prior art keywords
cylinder
plunger
oil
sucker
valve
Prior art date
Application number
RU2006109936/06A
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Russian (ru)
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RU2006109936A (en
Inventor
Михаил Иванович Галай
Александр Иванович Лобов
Николай Александрович Демяненко
Василий Сергеевич Мануйло
Original Assignee
Республиканское унитарное предприятие "Производственное объединение "Беларуснефть" (РУП "Производственное объединение "Беларуснефть")
Белорусский научно-исследовательский и проектный институт нефти РУП "Производственное объединение "Беларуснефть"
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Application filed by Республиканское унитарное предприятие "Производственное объединение "Беларуснефть" (РУП "Производственное объединение "Беларуснефть"), Белорусский научно-исследовательский и проектный институт нефти РУП "Производственное объединение "Беларуснефть" filed Critical Республиканское унитарное предприятие "Производственное объединение "Беларуснефть" (РУП "Производственное объединение "Беларуснефть")
Priority to RU2006109936/06A priority Critical patent/RU2317443C1/en
Publication of RU2006109936A publication Critical patent/RU2006109936A/en
Application granted granted Critical
Publication of RU2317443C1 publication Critical patent/RU2317443C1/en

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Abstract

FIELD: oil producing industry.
SUBSTANCE: invention is designed for use in oil wells with high oil-gas ratio and for wells with low flowing levels. Proposed sucker-rod pumping unit includes tubing string of which sucker-rod pump is secured consisting of cylinder, plunger with delivery valve installed in cylinder for reciprocating, and suction valve arranged in lower part of cylinder. Cylinder is provided with at least one radial hole communicating with annulus through housing secured on outer surface of cylinder and provided with at least one bypass valve. Radial hole is located higher than upper end face of plunger at its extreme lower position and lower than lower end face of plunger at its extreme upper position in cylinder.
EFFECT: increased capacity of tube sucker-rod pumps at production of oil in fields with high oil-gas ratio.
2 cl, 2 dwg

Description

The invention relates to the oil industry and is intended for the operation of oil wells with a high gas factor, as well as for wells where operation is carried out at low dynamic levels.
A well-known sucker rod installation (RU 2186949 C2, 2000.04.10), in which, during oil production from the beginning of the upward stroke of the plunger, free gas accumulated in the annulus of the well is introduced into the internal cavity of the cylinder to pump it together with the gas-liquid mixture, and at the end upward stroke of the plunger to increase the filling factor of the installation and ensure pumping of free gas into the internal cavity of the cylinder, under the influence of the pressure of the liquid column located in the tubing, from the number tsevogo spaces the separated liquid is introduced, which is sent to it on the walls of the tubing upstream under the action of gravitational force, wherein the separated liquid is throttled to further separation of gas therefrom and reducing the pressure in the inner cavity of the cylinder.
The disadvantage of this design is that during operation of the pump installation there is a constant hydraulic connection between the tubing cavity above the plunger of the well pump and the receiving cavity under the discharge valve of the plunger, which leads to the fact that due to a significant excess of the hydrostatic pressure of the liquid in the tubing string over the suction pressure the process of opening the suction valve and the fact that it is the same hydrostatic pressure and prevents the removal of free gas from under the plunger of the pump is hindered.
Also known is a well sucker-rod pumping unit (RU 2196249 C1, 2001.05.11) for pumping emulsion oils and gas-liquid mixtures, containing a tubing string with a liner, a sucker-rod pump with main and additional suction valves, and the pump sits on the supporting cone seat.
The disadvantage of this pump installation is that the design does not allow to pump out the water or liquid there from the bottom of the well. In addition, the problem of discharging free gas accumulating under the pump plunger has not been solved.
Closest to the proposed technological solution is a deep sucker rod pump (RU 2165010 C1, 08.16.1999), which includes a cylinder located in the cylinder with the possibility of reciprocating movement of the plunger with a discharge valve, a sleeve stop of the plunger, a suction valve located laterally outside the zone action plunger.
The disadvantage of this design is that when the gas factor of the well is increased, a “cap” of free gas builds up above the pump plunger, which significantly reduces the pump filling factor and has an undesirable effect on the operation of the sucker rod pump unit. In addition, when the plunger moves downward, fluid from the oil pipe string flows freely into the annulus through a radial hole, thereby reducing pump performance.
The objective of the invention is to increase the performance of tube sucker rod pumps during oil production in fields with a high gas factor.
The task is achieved in that the sucker rod installation, which includes a tubing string, on which a sucker rod pump is mounted, consisting of a cylinder located in the cylinder with the possibility of reciprocating movement of the plunger with a discharge valve, a suction valve, and in the cylinder at least one radial hole in communication with the annulus, according to the invention, a suction valve is located at the bottom of the cylinder, and the radial hole is communicated with Xia through annulus mounted on the outer surface of the cylinder body comprising at least one bypass valve, and is located above the upper end of the plunger in its lowermost position and below the lower end of the plunger at its uppermost position in the cylinder.
The bypass valve can be arranged so that under the influence of gravitational forces will tend to be in the open position.
Figure 1 shows the sucker rod pump during the plunger up; figure 2 - pumping unit during the stroke of the plunger down.
The sucker rod pump installation consists of a tubing string 1 and a pump mounted on it, consisting of a cylinder 2 with a suction valve 3 located in its lower part. A plunger 4 with a discharge valve 5 is located inside the cylinder 2 with the possibility of reciprocating movement. The plunger 4 is connected to the column of pump rods 6. A radial hole 7 is made on the lateral surface of the cylinder 2, which connects the receiving chamber 8 of the pump with the annular space 9 through a fixed outer surface cylinder 2 body 10, in the cavity 11 of which one or more bypass valves 12 is located. The seat 13 of the valve 12 is located on top of the valve, so the valve 12 is in the open position under the action of s gravity. In this case, the radial hole 7 is located so that the upper end 14 of the plunger 4 at its extreme lower position in the cylinder 2 (Fig. 2) is lower than this hole, and the lower end 15 of the plunger 4 at its extreme upper position in the cylinder 2 is higher than the hole (figure 1).
Rod pump installation operates as follows.
When the plunger 4 moves up from the lowermost position (Fig. 1), the pressure in the intake chamber 8 of the pump decreases, the suction valve 3 opens and the formation fluid enters the intake chamber 8. At the same time, free gas 16 begins to accumulate under the lower end 15 of the plunger 4, which released from reservoir fluid due to pressure reduction.
With further movement of the plunger 4 upward, its lower end 15 passes a radial hole 7 and the receiving chamber 8 is hydraulically connected to the cavity 11 of the housing 10. In this case, free gas through the radial hole 7 and open valve 12 enters the annulus 9. At the same time, oil from the annulus 9 under the influence of pressure of a dynamic level flows into the receiving chamber of the pump 8 and displaces the free gas, thereby increasing the filling coefficient and increasing the productivity of the pump.
When the plunger 4 moves downward (FIG. 2), the pressure in the intake chamber 8 of the pump and the cavity 11 of the housing 10 increases, the suction valve 3 and the bypass valve 12 of the housing 10 are closed, and the formation fluid flows through the open discharge valve 5 into the tubing string 1 and then to wellhead. After passing the upper end 14 of the plunger 4 to the radial hole 7, the hydraulic pressure of the liquid column located in the tubing string 1 acts on the valve 12 located in the housing 10 and does not allow it to open. Thus, the hydraulic connection between the annulus 9 and the tubing string 1 is blocked, preventing the flow of fluid into the annulus 9. The cycle is then repeated.

Claims (2)

1. A sucker rod pump installation, including a tubing string, on which a sucker rod pump is mounted, consisting of a cylinder located in the cylinder with the possibility of reciprocating movement of the plunger with a discharge valve, a suction valve, and at least in the cylinder one radial hole in communication with the annular space, characterized in that the suction valve is located in the lower part of the cylinder, and the radial hole communicates with the annular space through mounting on the outer surface of the cylinder body comprising at least one bypass valve, and is located above the upper end of the plunger in its lowermost position and below the lower end of the plunger at its uppermost position in the cylinder.
2. Installation according to claim 1, characterized in that the bypass valve is designed so that under the influence of gravitational forces tends to be in the open position.
RU2006109936/06A 2006-03-28 2006-03-28 Sucker-rod pumping unit RU2317443C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2006109936/06A RU2317443C1 (en) 2006-03-28 2006-03-28 Sucker-rod pumping unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2006109936/06A RU2317443C1 (en) 2006-03-28 2006-03-28 Sucker-rod pumping unit

Publications (2)

Publication Number Publication Date
RU2006109936A RU2006109936A (en) 2007-10-10
RU2317443C1 true RU2317443C1 (en) 2008-02-20

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RU2006109936/06A RU2317443C1 (en) 2006-03-28 2006-03-28 Sucker-rod pumping unit

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130302193A1 (en) * 2010-09-29 2013-11-14 Rivener Musavirovich Gabdullin Well-drilling sucker-rod pump
RU2712567C1 (en) * 2019-04-26 2020-01-29 Публичное акционерное общество «Татнефть» имени В.Д. Шашина Downhole sucker-rod pump for production of products with gas factor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130302193A1 (en) * 2010-09-29 2013-11-14 Rivener Musavirovich Gabdullin Well-drilling sucker-rod pump
US9181783B2 (en) * 2010-09-29 2015-11-10 Rivener Musavirovich Gabdullin Well-drilling sucker-rod pump
RU2712567C1 (en) * 2019-04-26 2020-01-29 Публичное акционерное общество «Татнефть» имени В.Д. Шашина Downhole sucker-rod pump for production of products with gas factor

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Publication number Publication date
RU2006109936A (en) 2007-10-10

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20160329